Simivar

Adds a sidebar widget to display Twitter updates (using the Javascript). You can set number of messages, color and other features.
You can change colors of shell background and shell text; tweet background, tweet text and tweet link. You can set on/off a features like scrollbar, show hashtags, poll for new results, show timestamps/avatars and the behavior.

Advanced Twitter Profile Widget

Adds a sidebar widget to display Twitter updates (using the Javascript). You can set number of messages, color and other features.

tommasomeli

Customize WordPress with Global Custom Fields! You can use GCF for example to create HTML + PHP shortcodes, global text fields, to save custom urls and retrieve them wherever you want and much more.
Add global fields in GCF Admin Page Create groups in the ‘Settings’ section and related fields in the ‘Fields’ section. Then edit the fields individually from the ‘GCF’ section.
Recover GCF with php Fields groups / single gcf can be retrieved anywhere within your theme / plugin with the function <code>get_gcf($group, $single = false, $eval = false)</code>
Show single GCF with a shortcode Load and display your single gcf with a shortcode! <code>[gcf group="group_name" field="field_name" eval=false]</code>
Each field is validated before saving. Add non-standard HTML tags and attributes in the “Settings” section if you need.
N.B. Use php “eval” only if you know what you’re doing. Save php fields using pseudo tags <code>[php] ... [/php]</code>
<a href="mailto:info@tommasomeli.it" rel="nofollow ugc">contact</a> me if you have any questions, issues, or suggestions. 
And leave a <a href="https://wordpress.org/support/plugin/global-custom-fields/reviews/#new-post" rel="ugc">review</a> to grow the project!

Global Custom Fields

Create Global Custom fields and save them into WP Options, get them with PHP or use gfc Shortcode

Advanced Twitter Profile Widget vs Global Custom Fields